Electric Insulations and Electric - Thermal Refractories Group Supplying variety of industrial ceramic products as electricinsulations such as coupling , porcelain terminal , lamp socket , car lamp socket , porcelain car lighter , glazed ceramic bush and etc. as well as lowvoltage insulators including spool , bushing and etc are the main products that can be provided domestically anddeveloped according to the orders received . Variety of ceramic and refractory products have manyapplications as electric – thermal insulator , they used in production of various types of thermal heater , manufacturing of sewing machines for polymer products, production of various types of thermal elements , in addition to the above mentioned ,cup lock and accessories , element supports , refractory pipes ( thermalresistance up to 1400 ° C ) are classified in this group.